body{
    background-image: url("../image/common/Inner_bg.jpg");
    background-repeat: no-repeat;
    background-size: 100% 100%;
    height: 100%;
    width: 100%;
    /*padding: 40px;*/
    font-family: sans-serif;
    background-attachment: fixed;
    -webkit-background-size: cover;
    -o-background-size: cover;
    -moz-background-size: cover;
}

.container_all{
    position: fixed;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
}

nav ul li span.active div{
    background: #464646;
    height: 4px;
    width: 80%;
}

nav ul li span.active a{
    font-family: SourceHanSansCN-Medium;
    color: #464646;
}